Concrete floor construction.



W. RASTER.

CONCRETE FLOOR CONSTRUCTION.

APPLIOATION FILED 51:11.26, 1909.

Patented Aug. 2, 1910.

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STATES OFFICE.

WALTHER EASTER, OF CHICAGO, ILLINOIS.

CONCRETE FLOOR CONSTRUCTION.

Speciiication of Letters Patent.

Original application led June 22, 1908, Serial No. 439,730. Divided andthis application filed April 26,

To all whom it may concern:

Be it known that I, WALTHER RAs'rER, citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Concrete FloorConstructions; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

This invention relates to a novel construction in a concrete floor andconsists more particularly in the construction of floor beams, theobject being to provide beams which when assembled in a lioor providemeans for securing fioor sleepers, ceilings and the like to the same andprovide for the insertion of keys between adjacent beams for the purposeof distributing the load, and consists in the features of constructionand combinations of parts hereinafter fully described and claimed.

In the accompanying drawings illustrating this invention: Figure -1- isa fragmentary transverse section of a ioor constructed in accordancewith my invention. Fig. 2- is a similar section on a slightly reducedscale showing a modication in the construction. Figs. -3-, -l -5-- and-6- are respectively perspective views of anchors and hangers adaptedfor use in securing floor sleepers and hanging ceilings and the likefrom the floor.

The present application is a division of the application filed by meJune 22, 1908, Serial No. 439,730 covering improvements in reinforcedconcrete constructions.

The object of the present invention is to provide iioor beams providedon their meeting faces with ribs and grooves respectively whereby ductsand slots are formed between adjacent beams in which anchors and hangersare received by means of which floor sleepers, ceilings, etc., areremovably se-y cured to the floor.

The beams A are preferably U-shaped in cross-section and inverted so asto provide the slab B and depending flanges C. The outer faces of thelatter are provided between their ends with horizontally disposed ribsD, the free outer faces of'which are adapted to abut against each otherwhen the beams are assembled in a floor. Below said Serial No. 492,286.

ribs D ribs E of less projection are provided between which when opposedin adjacent beams a slot F is formed which extends longitudinallybetween the same. Between the ribs D and E grooves G are provided whichwhen opposed in adjoining beams form what may be termed ducts extendinglongitudinally of the beams in which the heads of hangers are received,the latter being adapted to rest upon the upper faces of the ribs E andbe supported thereby.

Above the ribs D two pairs of ribs I-I and I respectively are providedwhich also project a lesser distance than said ribs D and between theopposing faces of which longitudinal slots are formed. Grooves J and Krespectively separate the ribs H from the ribs D and the ribs I from theribs H thus forming' additional ducts extending' longitudinally of thebeams and between opposing faces thereof. The ducts formed between theopposing grooves J and the slots formed between opposing ribs I-I areadapted to be filled with plastic cement which, when set, forms a key Lextending the entire length of the beams locking the same together andserving as a means for distributing stresses from each beam to the nextadjacent beams. The heads of anchors are adapted to be received in theducts formed between opposing grooves K and are adapted to engage thelower' faces of the ribs I, the shanks of said anchors passing throughthe slot between opposing ribs I and being secured to the sleepers Mupon which the wood flooring is adapted to be laid. As shown in Fig. -1-the sleepers M may extend longitudinally of the beams and are receivedin recesses N in the upper corners of opposing beams, or as shown inFig. '2- the sleepers O may extend transversely of the floor beams.

By mounting the floor sleepers as shown in Fig. -1- I gain very decidedadvantages in that the said sleepers cover the slots between adjacentbeams and further that the said sleepers may be so disposed as to leaveless space between the slabs of the beams and the lower face of the woodflooring to be filled with cinders or sound deadening material. Thus thecost of filling and the weight and thickness of the floor are allmaterially reduced without incurring any disadvantage to offset thesame. I am also enabled to employ heavier floor sleepers than areordinarily employed thus affording far better anchorage for theiiooring.

By means of my construction the fioor sleepers are easily and quicklysecured upon the upper faces of the beams while the ceiling P is easilyhung therefrom at any suitable distance below the free ends of theflanges C of the beams, and, as will be obvious, conduits of any kindmay be similarly hung from said beams between said ceiling and the freeends of said flanges C.

Any desired style of hanger or anchor may be employed and in Figs.-3-,-l-, 5- and -6- I have shown various forms of construction of thesame suited to my purpose. The device shown in Fig. -3- consists of anoblong plate Q, to which the shank R is secured, the latter beingprovided at its free end with an eye S through which a nail or screw orthe like is adapted to be passed into the sleeper to be anchoredthereby. The width of the plate or head Q, is slightly less than thewidth of the slot through which the same is adapted to be passed, butthe length of said plate is greater than the width of said slot so thatafter passing the same through the slot and turning it through an arc of90 degrees the end portions of said plate will engage the lower faces ofthe ribs I and thus prevent said head from being withdrawn. I haveillustrated the manner of use of this form of anchor in Fig. 2-.

In Figs. 1* and -5- I have shown two different forms of hangers oranchors in each of which the heads T and U respectively are pivotallysecured to the shank I7, said heads being adapted after insertionthrough the slots to be turned on their pivots so as to engage the upperfaces of the ribs E or the lower faces of the ribs I in order to thussecurely hold said shanks B against withdrawal.

In Fig. -6- I have shown a suitable device made of wire in which asubstantially Zsshaped head II7 is pivotally mounted between its endsupon one end of a shank X composed of a wire bent between its ends boththe free end portions Y thereof being adapted to be passed through theperforations in metal lath or bent around conduits or the like tosupport the latter. The said head IV is adapted to be inserted throughthe slot when disposed in the position shown in Fig. 6` and by thenturning the shank X through an arc of 90 degrees the free legs of thehead IIT are thrown into engagement with the upper faces of the ribs Ewhereupon by releasing said shank said head will turn through an arc of90 degrees so that said free legs will lie flatly upon said upper facesof said ribs E and thus anchor the device.

By means of this construction it will be noted that floors, ceilings,conduits, etc., are

easily and quickly secured and ma be relatively easily and quicklyremovec and replaced for purposes of repair or alteration.

I claim as my invention:

l. In a concrete licor, floor beams disposed side by side, at least oneof the opposing faces of adjacent beams being equipped with ribs ofvarying projection disposed at different elevations, the rib of greatestprojection contacting on its outer face with the adjacent beam, therebeing a longitudinal groove between adjacent ribs, access being had tosaid groove through a slot formed between a rib of lesser projection andthe opposing face of the adjacent beam, and fastening devices havingenlarged heads adapted to pass through said slot into said groove andinto engagement with the wall of the latter nearest the mouth of saidslot, said fastening devices adapted to secure other devices to saidlioor.

2. In a concrete floor, floor beams each provided on at least one of itsouter side faces with a plurality of horizontal ribs disposed atdiii'erent elevations and varying in projection from said face, the ribof greatest projection contacting on its free face with the nextadjacent beam, there being continuous longitudinal grooves betweenadjacent ribs and slots formed between the ribs of lesser projection andthe next ad` jacent beam above and below the rib of greatest projectionthrough which access is had to said grooves, said rib of greatestprojection constituting a partition wall between the free spaces aboveand below the same and between adjacent beams, and fastening deviceshaving enlarged heads adapted to pass through said slots and engage theshoulders formed by the horizontal faces of the ribs of lesserprojection, said fastening devices adapted to secure other devices tothe Hoor.

3. In a concrete floor, ioor beams each provided on its outer side faceswith longitudinal ribs of varying projection disposed at differentelevations, the ribs of greatest projections of adjacent beams abuttingagainst each other, there being free spaces between adjacent beams towhich access is had through slots formed between opposed ribs of lesserprojection, sleepers disposed on said licor, and anchors having enlargedheads entering said slots and engaging the shoulders formed by the lowerfaces of opposed ribs of lesser projection and at their free endsengaging said sleepers to secure the latter.

4f. In a concrete floor, floor beams each provided on its outer sidefaces with longitudinal ribs of varying projection disposed at differentelevations, the ribs of greatest projection of adjacent beams abuttingagainst each other, there being free spaces between adjacent beams aboveand below said ribs of greatest projection to which access is hadthrough the slots formed between opposed ribs of lesser projection, andhangers having enlarged heads adapted to pass through the lowermostslots and engage the shoulders formed by the horizontal upper faces ofthe lowermost ribs of lesser projection, said hangers being adapted toengage devices to be suspended from said floor.

5. In a concrete floor, floor beams each provided on its outer sidefaces with longitudinal ribs of varying projection disposed at differentelevations, the ribs of greatest projection of adjacent beams abuttingagainst each other, there being free spaces between adjacent beams aboveand below said ribs of greatest projection to which access is hadthrough the slots formed be tween opposed ribs of lesser projection, andhangers and anchors respectively each having enlarged heads adapted topass through said slots and engage the shoulders formed by thehorizontal faces of said ribs of lesser projection, said hangers beingadapted to engage devices to be suspended from said floor and saidanchors being adapted to engage and secure devices upon the floor,substantially as described.

6.' In a floor composed of a plurality of concrete beams disposed sideby side, sleepers sunk into recesses in the upper corners of said beams,there being slots between adjacent beams covered by said sleepers, saidslots being laterally enlarged below their mouths, and anchors havingenlarged heads engaging the upper walls of the enlarged portions of saidslots and engaging said sleepers to secure the latter.

In testimony whereof I have signed my name in the presence of twosubscribing witnesses.

WALTHER RASTER.

Witnesses:

RUDOLPH WM. Lo'rz, M. M. BoYLE.

